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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2009 Red Hat, Inc.</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * Red Hat licenses this file to you under the Apache License, version 2.0</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with the</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * License.  You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *    <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.util;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> java.util.Collections;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.util.IdentityHashMap;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> java.util.Set;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.AbstractExecutorService;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.Executor;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.ExecutorService;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.RejectedExecutionException;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.TimeUnit;
<a class="jxr_linenumber" name="27" href="#27">27</a>  
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFactory;
<a class="jxr_linenumber" name="29" href="#29">29</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
<a class="jxr_linenumber" name="30" href="#30">30</a>  
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> * A delegating {@link ExecutorService} with its own termination management.</em>
<a class="jxr_linenumber" name="34" href="#34">34</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_javadoccomment"> * {@link VirtualExecutorService} is used when you want to inject an</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment"> * {@link ExecutorService} but you do not want to allow the explicit termination</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * of threads on shutdown request.  It is particularly useful when the</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> * {@link ExecutorService} to inject is shared by different components and</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <em class="jxr_javadoccomment"> * the life cycle of the components depend on the termination of the injected</em>
<a class="jxr_linenumber" name="40" href="#40">40</a>  <em class="jxr_javadoccomment"> * {@link ExecutorService}.</em>
<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_javadoccomment"> * ExecutorService globalExecutor = ...;</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment"> * ExecutorService virtualExecutor = new {@link VirtualExecutorService}(globalExecutor);</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment"> * {@link ChannelFactory} factory =</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment"> *         new {@link NioServerSocketChannelFactory}(virtualExecutor, virtualExecutor);</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment"> * ...</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment"> * // ChannelFactory.releaseExternalResources() shuts down the executor and</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment"> * // interrupts the I/O threads to terminate all I/O tasks and to release all</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment"> * // resources acquired by ChannelFactory.</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment"> * factory.releaseExternalResources();</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment"> * // Note that globalExecutor is not shut down because VirtualExecutorService</em>
<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * // implements its own termination management. All threads which were acquired</em>
<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> * // by ChannelFactory via VirtualExecutorService are returned to the pool.</em>
<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * assert !globalExecutor.isShutdown();</em>
<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * &lt;h3&gt;The differences from an ordinary {@link ExecutorService}&lt;/h3&gt;</em>
<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * A shutdown request ({@link #shutdown()} or {@link #shutdownNow()}) does not</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> * shut down its parent {@link Executor} but simply sets its internal flag to</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment"> * reject further execution request.</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment"> * {@link #shutdownNow()} interrupts only the thread which is executing the</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment"> * task executed via {@link VirtualExecutorService}.</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment"> * &lt;p&gt;</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment"> * {@link #awaitTermination(long, TimeUnit)} does not wait for real thread</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment"> * termination but wait until {@link VirtualExecutorService} is shut down and</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment"> * its active tasks are finished and the threads are returned to the parent</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment"> * {@link Executor}.</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://www.jboss.org/netty/" target="alexandria_uri">http://www.jboss.org/netty/</a>"&gt;The Netty Project&lt;/a&gt;</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment"> * @author &lt;a href="<a href="http://gleamynode.net/" target="alexandria_uri">http://gleamynode.net/</a>"&gt;Trustin Lee&lt;/a&gt;</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment"> * @version $Rev: 2122 $, $Date: 2010-02-02 11:00:04 +0900 (Tue, 02 Feb 2010) $</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment"> * @apiviz.landmark</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">VirtualExecutorService</a> <strong class="jxr_keyword">extends</strong> AbstractExecutorService {
<a class="jxr_linenumber" name="82" href="#82">82</a>  
<a class="jxr_linenumber" name="83" href="#83">83</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Executor e;
<a class="jxr_linenumber" name="84" href="#84">84</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> ExecutorService s;
<a class="jxr_linenumber" name="85" href="#85">85</a>      <strong class="jxr_keyword">final</strong> Object startStopLock = <strong class="jxr_keyword">new</strong> Object();
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> shutdown;
<a class="jxr_linenumber" name="87" href="#87">87</a>      Set&lt;Thread&gt; activeThreads = <strong class="jxr_keyword">new</strong> MapBackedSet&lt;Thread&gt;(<strong class="jxr_keyword">new</strong> IdentityHashMap&lt;Thread, Boolean&gt;());
<a class="jxr_linenumber" name="88" href="#88">88</a>  
<a class="jxr_linenumber" name="89" href="#89">89</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     * Creates a new instance with the specified parent {@link Executor}.</em>
<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="92" href="#92">92</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">VirtualExecutorService</a>(Executor parent) {
<a class="jxr_linenumber" name="93" href="#93">93</a>          <strong class="jxr_keyword">if</strong> (parent == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="94" href="#94">94</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"parent"</span>);
<a class="jxr_linenumber" name="95" href="#95">95</a>          }
<a class="jxr_linenumber" name="96" href="#96">96</a>  
<a class="jxr_linenumber" name="97" href="#97">97</a>          <strong class="jxr_keyword">if</strong> (parent instanceof ExecutorService) {
<a class="jxr_linenumber" name="98" href="#98">98</a>              e = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="99" href="#99">99</a>              s = (ExecutorService) parent;
<a class="jxr_linenumber" name="100" href="#100">100</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="101" href="#101">101</a>             e = parent;
<a class="jxr_linenumber" name="102" href="#102">102</a>             s = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="103" href="#103">103</a>         }
<a class="jxr_linenumber" name="104" href="#104">104</a>     }
<a class="jxr_linenumber" name="105" href="#105">105</a> 
<a class="jxr_linenumber" name="106" href="#106">106</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isShutdown() {
<a class="jxr_linenumber" name="107" href="#107">107</a>         <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="108" href="#108">108</a>             <strong class="jxr_keyword">return</strong> shutdown;
<a class="jxr_linenumber" name="109" href="#109">109</a>         }
<a class="jxr_linenumber" name="110" href="#110">110</a>     }
<a class="jxr_linenumber" name="111" href="#111">111</a> 
<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isTerminated() {
<a class="jxr_linenumber" name="113" href="#113">113</a>         <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="114" href="#114">114</a>             <strong class="jxr_keyword">return</strong> shutdown &amp;&amp; activeThreads.isEmpty();
<a class="jxr_linenumber" name="115" href="#115">115</a>         }
<a class="jxr_linenumber" name="116" href="#116">116</a>     }
<a class="jxr_linenumber" name="117" href="#117">117</a> 
<a class="jxr_linenumber" name="118" href="#118">118</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> shutdown() {
<a class="jxr_linenumber" name="119" href="#119">119</a>         <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="120" href="#120">120</a>             <strong class="jxr_keyword">if</strong> (shutdown) {
<a class="jxr_linenumber" name="121" href="#121">121</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="122" href="#122">122</a>             }
<a class="jxr_linenumber" name="123" href="#123">123</a>             shutdown = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="124" href="#124">124</a>         }
<a class="jxr_linenumber" name="125" href="#125">125</a>     }
<a class="jxr_linenumber" name="126" href="#126">126</a> 
<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">public</strong> List&lt;Runnable&gt; shutdownNow() {
<a class="jxr_linenumber" name="128" href="#128">128</a>         <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="129" href="#129">129</a>             <strong class="jxr_keyword">if</strong> (!isTerminated()) {
<a class="jxr_linenumber" name="130" href="#130">130</a>                 shutdown();
<a class="jxr_linenumber" name="131" href="#131">131</a>                 <strong class="jxr_keyword">for</strong> (Thread t: activeThreads) {
<a class="jxr_linenumber" name="132" href="#132">132</a>                     t.interrupt();
<a class="jxr_linenumber" name="133" href="#133">133</a>                 }
<a class="jxr_linenumber" name="134" href="#134">134</a>             }
<a class="jxr_linenumber" name="135" href="#135">135</a>         }
<a class="jxr_linenumber" name="136" href="#136">136</a> 
<a class="jxr_linenumber" name="137" href="#137">137</a>         <strong class="jxr_keyword">return</strong> Collections.emptyList();
<a class="jxr_linenumber" name="138" href="#138">138</a>     }
<a class="jxr_linenumber" name="139" href="#139">139</a> 
<a class="jxr_linenumber" name="140" href="#140">140</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> awaitTermination(<strong class="jxr_keyword">long</strong> timeout, TimeUnit unit)
<a class="jxr_linenumber" name="141" href="#141">141</a>             <strong class="jxr_keyword">throws</strong> InterruptedException {
<a class="jxr_linenumber" name="142" href="#142">142</a>         <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="143" href="#143">143</a>             <strong class="jxr_keyword">while</strong> (!isTerminated()) {
<a class="jxr_linenumber" name="144" href="#144">144</a>                 startStopLock.wait(TimeUnit.MILLISECONDS.convert(timeout, unit));
<a class="jxr_linenumber" name="145" href="#145">145</a>             }
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>             <strong class="jxr_keyword">return</strong> isTerminated();
<a class="jxr_linenumber" name="148" href="#148">148</a>         }
<a class="jxr_linenumber" name="149" href="#149">149</a>     }
<a class="jxr_linenumber" name="150" href="#150">150</a> 
<a class="jxr_linenumber" name="151" href="#151">151</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> execute(Runnable command) {
<a class="jxr_linenumber" name="152" href="#152">152</a>         <strong class="jxr_keyword">if</strong> (command == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="153" href="#153">153</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> NullPointerException(<span class="jxr_string">"command"</span>);
<a class="jxr_linenumber" name="154" href="#154">154</a>         }
<a class="jxr_linenumber" name="155" href="#155">155</a> 
<a class="jxr_linenumber" name="156" href="#156">156</a>         <strong class="jxr_keyword">if</strong> (shutdown) {
<a class="jxr_linenumber" name="157" href="#157">157</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RejectedExecutionException();
<a class="jxr_linenumber" name="158" href="#158">158</a>         }
<a class="jxr_linenumber" name="159" href="#159">159</a> 
<a class="jxr_linenumber" name="160" href="#160">160</a>         <strong class="jxr_keyword">if</strong> (s != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="161" href="#161">161</a>             s.execute(<strong class="jxr_keyword">new</strong> <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">ChildExecutorRunnable</a>(command));
<a class="jxr_linenumber" name="162" href="#162">162</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="163" href="#163">163</a>             e.execute(<strong class="jxr_keyword">new</strong> <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">ChildExecutorRunnable</a>(command));
<a class="jxr_linenumber" name="164" href="#164">164</a>         }
<a class="jxr_linenumber" name="165" href="#165">165</a>     }
<a class="jxr_linenumber" name="166" href="#166">166</a> 
<a class="jxr_linenumber" name="167" href="#167">167</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">ChildExecutorRunnable</a> <strong class="jxr_keyword">implements</strong> Runnable {
<a class="jxr_linenumber" name="168" href="#168">168</a> 
<a class="jxr_linenumber" name="169" href="#169">169</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Runnable runnable;
<a class="jxr_linenumber" name="170" href="#170">170</a> 
<a class="jxr_linenumber" name="171" href="#171">171</a>         <a href="../../../../org/jboss/netty/util/VirtualExecutorService.html">ChildExecutorRunnable</a>(Runnable runnable) {
<a class="jxr_linenumber" name="172" href="#172">172</a>             <strong class="jxr_keyword">this</strong>.runnable = runnable;
<a class="jxr_linenumber" name="173" href="#173">173</a>         }
<a class="jxr_linenumber" name="174" href="#174">174</a> 
<a class="jxr_linenumber" name="175" href="#175">175</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> run() {
<a class="jxr_linenumber" name="176" href="#176">176</a>             Thread thread = Thread.currentThread();
<a class="jxr_linenumber" name="177" href="#177">177</a>             <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="178" href="#178">178</a>                 activeThreads.add(thread);
<a class="jxr_linenumber" name="179" href="#179">179</a>             }
<a class="jxr_linenumber" name="180" href="#180">180</a>             <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="181" href="#181">181</a>                 runnable.run();
<a class="jxr_linenumber" name="182" href="#182">182</a>             } <strong class="jxr_keyword">finally</strong> {
<a class="jxr_linenumber" name="183" href="#183">183</a>                 <strong class="jxr_keyword">synchronized</strong> (startStopLock) {
<a class="jxr_linenumber" name="184" href="#184">184</a>                     <strong class="jxr_keyword">boolean</strong> removed = activeThreads.remove(thread);
<a class="jxr_linenumber" name="185" href="#185">185</a>                     assert removed;
<a class="jxr_linenumber" name="186" href="#186">186</a>                     <strong class="jxr_keyword">if</strong> (isTerminated()) {
<a class="jxr_linenumber" name="187" href="#187">187</a>                         startStopLock.notifyAll();
<a class="jxr_linenumber" name="188" href="#188">188</a>                     }
<a class="jxr_linenumber" name="189" href="#189">189</a>                 }
<a class="jxr_linenumber" name="190" href="#190">190</a>             }
<a class="jxr_linenumber" name="191" href="#191">191</a>         }
<a class="jxr_linenumber" name="192" href="#192">192</a>     }
<a class="jxr_linenumber" name="193" href="#193">193</a> }
</pre>
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